Aug 2026· Spectrochimica Acta Part A - Molecular and Biomolecular Spectroscopy· Vol 364 Pt 1, pp.
128542
· 0 citations· 29 references
Medicine
Abstract
We report a comparative picosecond dielectric relaxation study of trihydric alcohols (glycerol, 1,2,4-butanetriol, 1,2,5-pentanetriol, 1,2,6-hexanetriol) in binary mixtures with dimethyl sulfoxide (DMSO). Using time-domain reflectometry (TDR) in the GHz frequency range of 10 MHz to 30 GHz, we determined ε₀, τ, geff, Bruggeman factor, and excess parameters. The relaxation dynamics showed pronounced dependence on chain length and hydroxyl arrangement: longer chain triols exhibited deviations from ideal mixing due to enhanced flexibility, whereas glycerol retained unique relaxation due to compact hydrogen-bonding networks. Excess parameters and Kirkwood factors confirmed cooperative/anti-cooperative dipolar behavior modulated by solute structure. These results fill a gap in dielectric relaxation literature on trihydric alcohols and provide insights for solvent system design in biochemical and cryoprotective applications.
The complex dielectric spectra of binary mixtures of 3-chloroaniline (3-CA) and 1-methoxy-2-propanol (PGME) were measured at 298 K over a frequency range from 10 MHz to 30 GHz for eleven different volume compositions. The dielectric parameters, namely the complex dielectric permittivity spectra (ε′) and complex dielect...
Venkatesh Vispute, Mandar Gaikwad, N. Garad et al.· Discover Chemistry· 0 citations
The dielectric properties of a series of alcohols, from methanol to 1nonanol, were studied using molecular dynamics simulations. Three commonly used force elds, the united atom OPLS and TraPPE and the all atom CHARMM, were employed to calculate the static dielectric constant, Kirkwood correlation factor, collective and...
Martina Požar· Journal of Physics: Condense...· 0 citations
Fast field cycling (FFC) NMR relaxometry allows the investigation of molecular dynamics over a broad frequency range from 10 kHz up to 100 MHz. However, quantitative data interpretation is often limited by system-specific motional models and simplified assumptions for the analytical form of the relevant time correlatio...
Angel Mary Chiramel Tony, Lennart Kruse, Johanna Busch et al.· Physical Chemistry, Chemical...· 0 citations
In alcohols, the hydrogen bonded network impacts important thermophysical properties, such as boiling point and viscosity. Hydrogen bonding in alcohols is influenced by solvent accessibility (steric hindrance) of the hydroxyl group. Quantifying hydrogen bonding of alcohols is critical to understanding their dissolution...
Y. Kazemipour, Jacob T. Pawlik, Sarah R. Evans et al.· Journal of Chemical Physics· 0 citations
We discuss a systematic investigation into the liquid/vapor equilibria and interfacial properties of a homologous series of dialkyl carbonates (DACs), specifically dimethyl carbonate (D1C), diethyl carbonate (D2C), dipropyl carbonate (D3C), and dibutyl carbonate (D4C), using classical molecular dynamics simulations (CM...
The thermophysical behavior and molecular origins of dynamic viscosity (η) non-ideality in binary mixtures of acetonitrile (ACN) with six tertiary alkanolamines, namely dimethylethanolamine (DMEA), dimethylpropan-1-olamine (DMPA-1), dimethylpropan-2-olamine (DMPA-2), methyldiethanolamine (MDEA), ethyldiethanolamine (ED...
Muhammad A. R. Khan, M. Rocky, Md. Ariful Islam et al.· Physical Chemistry, Chemical...· 0 citations
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